Probably each person has the favourite toy - a childhood memory which it is difficult to leave. And I have a favourite toy - the small monkey with a white shaggy paunch, the rag legs put in checkered boots, filled by foam rubber. Small black eyes look at you from the hitretsy. This monkey to me presented on the kindergarten termination - I was six years old. In my hands the toy revived: could laugh or cry, use cunning or be angry. She was with me everywhere. The most important that the favourite toy bears with itself is associations. In me the passing on this toy causes tens memoirs of my childhood. First, carefree laughter which didn't die away in our house. Secondly, at the same time, this regret about the left childhood and how it was a little necessary for happiness. Whatever happened in my life, I could be firmly sure that its look will remain the same: derisive the consoling. Everything in life changes, but the person of a toy - a look in which your baby face and, unconscious then, sincere belief in good is reflected is invariable. Исправьте ошибки!

В первом предложении артикль the неуместен. Правилен "a". Во втором предложении более корректным было бы поставить двоеточие вместо тире, после которого также стоит неопределенный артикль "a". Что такое hitretsy мне не очень понятно, и вообще предложение третье предложение неправильно составлено. 

This monkey to me presented on the kindergarten termination - I was six years old

Правильно: This monkey was presented to me on the kindergarten termination when I was six years old.

 In my hands the toy revived

Более верным было бы не revived, a turned to life.

could laugh or cry, use cunning or be angry.

it's could laugh and cry, be sly or angry

She was with me everywhere.

Игрушка — неодушевленная вещь, поэтому нельзя применять к ней местоимение She. Верным будет It.

The most important that the favourite toy bears with itself is associations.

после important нужно вставить is.

memoirs

memories. Ваше слово будет мемуарами, а не воспоминаниями.

Затем Firstly

die away — такого глагола не существует, и мне даже непонятно, что вы хотели этим сказать.

Самые очевидные ошибки. Не ручаюсь, что все будет правильно после